Originally Posted by zenwhipper
I am racking up about 135 miles per week right now and feel I am on track to be ready for the 100 miler.
You don't mention what kind of rides you do to get 135 miles per week. A lot of short rides or a few longer rides? Riding 100 miles in a single ride is much different than riding 20 miles per day. As other people have mentioned, saddle time and nutrition end up being much more important, and fatigue will make the later miles much harder if you haven't trained at long distances before.